Fig. 2

Identification of the microbial enzymatic reactions associated with the 4 water column features. Nonmetric multidimensional scaling of the matrices of enzymatic reaction abundances from a metagenomes and b metatranscriptomes. Distribution of gene indices calculated for the enzymatic reactions from c metagenomes and d metatranscriptomes in the 4 water features. Blue/green, distribution for enzymatic reactions involved in the degradation of aromatic compounds from metagenomes (blue) and metatranscriptomes (green); gray, distribution for all enzymatic reactions not involved in the degradation of aromatic compounds